# Air direction knob literally stuck in 2001 Silverado **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, 1500\ **Created:** [March 12, 2015, 10:08am UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279 "2015-03-12T10:08:35Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![mountainsandhills](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@mountainsandhills](https://community.cartalk.com/u/mountainsandhills)\ **Post date:** [March 12, 2015, 10:08am UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/1 "2015-03-12T10:08:35Z")
Hello, I have an old base model 2001 Silverado, so manual everything. Here’s my problem-- the air direction control knob (feet, defrost, face, etc.) is stuck on defrost. Literally stuck. Obviously, the knob attaches to and is supposed to turn a metal rod that then changes the direction of the air flow, but the rod will not turn at all…I even detached the knob and tried to turn it with a pliers! The climate control and fan speed knobs both work. Any ideas on what might be causing this? Thanks! ---
**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\ **Post date:** [March 12, 2015, 8:00pm UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/2 "2015-03-12T20:00:53Z")
I would probably pull the directional control and see why it’s stuck. If something was broken inside which prevented the rotation…it was be a simple job to install a new actuator control. Here is a similar setup: > **[Sparkys Answers - 2003 Chevrolet Silverado, Changing the Mode Actuator, Code...](https://sparkys-answers.com/2011/02/2003-chevrolet-silverado-changing-mode.html)** > > Sparkys Answers - 2003 Chevrolet Silverado, Changing the Mode Actuator, Code B0263 ---
**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\ **Post date:** [March 12, 2015, 8:03pm UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/3 "2015-03-12T20:03:03Z")
> _...but the rod will not turn at all...I even detached the knob and tried to turn it with a pliers!_ So, with the rod disconnected from the knob, you can turn the rod with pliers but not the knob, right? ---
**Author:** ![mountainsandhills](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@mountainsandhills](https://community.cartalk.com/u/mountainsandhills)\ **Post date:** [March 12, 2015, 8:20pm UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/4 "2015-03-12T20:20:20Z")
thanks missileman, I’ll read up. Insightful, even with the knob disconnected, I cannot turn the rob. It’s simply stuck. ---
**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\ **Post date:** [March 12, 2015, 10:36pm UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/5 "2015-03-12T22:36:01Z")
Maybe try some silicone spray and work it back and forth. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [March 13, 2015, 2:13am UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/6 "2015-03-13T02:13:55Z")
The problem is most likely with the vent control module itself. > **[Dorman Products - 599-127](https://www.dormanproducts.com/p-72703-599-127.aspx?origin=keyword)** > > Remanufactured Climate Control Module If you look at the back of the module you’ll see the vacuum ports. One vacuum port is supply vacuum, and the other ports are control vacuum. The vacuum manifold inside the vent control module has a spool valve. That’s the part you’re trying to turn. The spool valve has a series of O-rings that directs the vacuum to the proper position to operate the vacuum mode doors to move them into their proper position. If the O-rings on the spool valve fail, they can jam the spool valve making it almost impossible to move the mode control knob. And if the vent control module fails, it defaults to the defrost mode so you can keep the windshield clear for safety. A new vent control module will fix the problem. Tester ---
**Author:** ![mountainsandhills](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@mountainsandhills](https://community.cartalk.com/u/mountainsandhills)\ **Post date:** [March 13, 2015, 5:22pm UTC](https://community.cartalk.com/t/air-direction-knob-literally-stuck-in-2001-silverado/89279/7 "2015-03-13T17:22:06Z")
@Tester – that sounds very possible. How would someone fix something like that? Would it be as simple as replacing the entire vent control module, or would there be other issues I’d need to check, as well? Thanks